title: Evolution. A case of male opportunism.
authors.forename: M
authors.initials: M
authors.lastname: Andersson
mesh_terms: D000818:Animals; D005075:Biological Evolution; D005260:Female; D008297:Male; D011898:Ranidae / Q000502:physiology*; D012727:Sex Characteristics; D012726:Sexual Behavior, Animal / Q000502:physiology*